Brooder



Sept. 17, 1929- G. ALLMAN ET AL BROODER Filed Aug. 10, 1927 Patented Sept. 17, 1929 UNITED STATES PATENT; OFFICE GEORGE ALLMAN AND STANLEY BAIRD immature, or ,PARKERVILLE, WESTERN AUSTRALIA, AUSTRALIA Q BEoonEn Application filed August 10, 1927. Serial noflsziaoeo,

This invention provides an efficient and reliable brooder for the rearing of. chickens, ducldings and other newly hatched birds and which being made chiefly of metal, is easily maintained ina clean condition and free from vermin while owing to its being of a circular shape or plan is enabled to snugly accommodate a maximum number of birds. A chief structural feature of the invention resides in the means employed for the conveyance and utilization of the heat which is generated by a heater and burner which also acts as the base for the brooder.

The construction and use of the invention will be explained with the aid of the attached drawings wherein Fig. 1 is a sectional elevation showing the brooder and F 2 is a verti 'al section of the cistern and burner.

Referring to said drawings, the brooder proper comprises a preferably circular cone shaped canopy 3, to which is secured an innor concentric conical chamber at by means of the chimney 5 and perforated ring flange 6. The chimney 5 is provided with a cap 7 whose duty is to prevent any foreign matter from I entering same, said chimney having ports 8 for the escape of excess hot air. A sleeve 9 telescopically fits within the chimney 5 and depends a suitable depth into the chamber 4, by means of which sleeve the excess hot air is led to the outlet ports 8 aforesaid.

In said views the single and double headed arrows respectively. denote the direction of travel of the air and heat. A space is formed between said canopy 3 and chamber 4 and acts as a hot air passage leading to the interior of the brooder proper. Within this inner chamber 4 is positioned a circular disk or baffle plate 10 lined with a sheet a of asbestos or other heat resisting material, said plate being spaced above the floor of the chamber 4. and above the upper end 11 of the chimney 12 of the burner. The purpose of this plate 10 is to deflect the heat onto the floor of said chamber 4. Concentric with the chimney 12 and depending from the underside of the chamber is a cylindrical tube 13 which terminates at a point above the floor or support for tl ebrooder. The purpose of this tube 13 is to guide the fresh air to the burner. An

outer tubular'member 14 concentric with the tube 13 depends from the bottom of the chamber 4i and has its lower edgei'seatedon the oil cistern 15 of the burner. The upper portion of said tubular-member li is perforated at 16 to allow of the admissionof air to the burner through the perforated lower end 17 of the burner chimney 12. Depending from the outer edge of the canopy 3 is a curtain 18 having openings 19 for the admission of fresh air and also for the passage of the birds.

Said curtain at its upper edge is secured by a circumferentialclamping ring '20 orin any desired manner to the canopy aforesaid. The oil cistern 15 for the burner is preferably circular in shape and in use is buried slightly below ground level as shown in F 2, so that its top is flushwith said level and forms the floor of the brooder. This cistern is made with anupstanding circularflange 21 which acts as a guardfor thebirds within the brooder, and said flange telescopes neatly with the dependent tubular member 14: afores said.-""

The cistern is provided with a sealing plug 22 adapted to interscrew with a flange 23 fit- I This screwing and unscrewing said plug 22. The

' Wick tube 24: is provided at its lower end with a'seatin'g member 27to rest upon the bottom of the cistern and maintain said tube in an upright position when the plug 22 is removedh The operation of the brooderis as follows: hen the wick in the tubej2 1is ignited air is drawnfromtheouteratmosphere through the openings 19 of the curtain 1S, and passes tln'oughtlie perforated upper end16' of the tubular member "14 and travelling downwardly between the tube 13 and tubular memberletenters through the open perforations 17 of the chimney 12 to flame.

The now heated air rises through said chimney 12 and is radially diverted or spread between the baflle plate 10 and the bottom of the chamber 4 into the chamber 4 during which the heat downwardly radiates through the floor of said chamber into the brooding compartment.

The heat also radiates through the sloping walls of the chamber 4 into the concentric passage between said chamber and the canopy 3 from whence it passes downwardly between the outer edge of the chamber 4 and curtain 18 into the brooder compartment. The perforations of the ring flange 6 allow free passing of the heat through said passage. The 6X86SS'l10t air from the chamber 4 travels up through sleeve 9 and out of the chimney 5.

What we claim as our invention and desire to secure by Letters Patent is: i

1. A brooder comprising a'canopy havin a central opening, a chamber below saic canopy, said chamber having an upper wall parallel to but spaced from the under side of said canopy and a lower wall,the upper and lower walls of said chamber having apertures in vertical alignment with the opening in the canopy, a chimney extending from the opening in the upper wall of said chamber through the opening in the canopy, a tube depending from the opening in the lower wall 01" the chamber, a baffle in said chamber above the opening in the lower wall thereof and spaced from said wall, and a sleeve telescopically adjustable in said chimney to vary the space between its lower end and said upper side of said bafiie.

2. A brooder according to claim 1 wherein the canopy and the upper wall of the chamber are or substantially cone-shape.

3. A brooder according to claim 1 embodying a burner below the lower end of the tube and a burner chimney within and spaced from said tube and surrounding said burner, said burner chimney having its lower portion extending below the lower end of said tube and provided with perforations.

4. A brooder according to claim 1 embodying a burner below the lower end of the tube,

a burner chimney surrounding the burner and spaced from said tube, said burner chimney having its lower portion extending below the lower end of said tube and having perforations in its lower portion, and a tubular member depending from the lower wall of the.

chamber and surrounding but spaced from the tube, said tubular member having its lower end extending below the lower end of the tube and being perforated adjacent its upper end.

5. A brooder according to claim 1, including an oil cistern having a filling opening in 7, its top and a flange concentric with said opening and extending upwardly from said cistern, a tubular member depending from the underside of the chamber in telescoplc relation with said flange and surrounding the 

